Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D301/00—Preparation of oxiranes
  • C07D301/27—Condensation of epihalohydrins or halohydrins with compounds containing active hydrogen atoms
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D303/00—Compounds containing three-membered rings having one oxygen atom as the only ring hetero atom
  • C07D303/02—Compounds containing oxirane rings
  • C07D303/12—Compounds containing oxirane rings with hydrocarbon radicals, substituted by singly or doubly bound oxygen atoms
  • C07D303/16—Compounds containing oxirane rings with hydrocarbon radicals, substituted by singly or doubly bound oxygen atoms by esterified hydroxyl radicals
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D301/00—Preparation of oxiranes
  • C07D301/27—Condensation of epihalohydrins or halohydrins with compounds containing active hydrogen atoms
  • C07D301/30—Condensation of epihalohydrins or halohydrins with compounds containing active hydrogen atoms by reaction with carboxyl radicals
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D301/00—Preparation of oxiranes
  • C07D301/32—Separation; Purification
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D301/00—Preparation of oxiranes
  • C07D301/36—Use of additives, e.g. for stabilisation
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D303/00—Compounds containing three-membered rings having one oxygen atom as the only ring hetero atom
  • C07D303/02—Compounds containing oxirane rings
  • C07D303/04—Compounds containing oxirane rings containing only hydrogen and carbon atoms in addition to the ring oxygen atoms

Definitions

• the present invention relates to a method for preparing glycidyl ester compounds.
• Glycidyl esters are mainly used as diluents for epoxy resins with high boiling point, and they also are used to produce resin compositions of various compositions such as epoxy resin, ester resin, alkyd resin and acrylic resin by reacting with acrylic acid, polyol, polyacid, etc.
• the olefin-derived glycidyl ester having a C5 to C10 alkyl group such as neodecanoic acid glycidyl ester itself is usefully used as a reactive diluent for the preparation of thermosetting acrylic acid, epoxy polyester, urethane paint and coatings.
• the glycidyl ester and the method thereof are prepared by the reaction of alkali salt of carboxylic acid and epichlorohydrin, and at this time, the reaction is carried out at from 50 to 150° C. in the presence of a catalyst, an alkali salt and water.
• This method produces a large amount of unreacted materials with the final products and also generates a large amount of intermediates or by-products during the reaction, so that the separation of the final products was not easy.
• WO1997/044335 has proposed that the yield of glycidyl ester can be increased by removing water and by-product through vacuum distillation method.
• the vacuum distillation method has a problem that since the amount of glycidyl ester removed to obtain high purity glycidyl ester is too large, it is not preferable from the viewpoint of productivity.
• Korean Patent Laid-open Publication No. 2001-0090503 discloses that the glycidyl ester can be prepared with a yield of about 90% by dissolving monocarboxylic acid and epichlorohydrin in a mixed solvent containing water and then adding a catalyst such as metal hydroxide and then reacting them.
• the method disclosed in the above patent publication has an advantage that the glycidyl ester can be produced at a high yield, since the reactant and the solvent are used at a weight ratio of 1:1, and the amount of reactant introduced into the reactor is limited due to the solvent used, there is a limit to increase the unit output of the final glycidyl ester-based compound.
• the inventors of the present invention have studied various methods for improving the unit output of the glycidyl ester compound. And they have come up with the idea that when only the reactants are used without the use of the reaction solvent in the preparation of the glycidyl ester compound, the unit output of the finally produced compound may be increased. Thereafter, they have invented a method capable of preparing the compound without using the reaction solvent through continuous research and development, thereby completing the present invention.
• the present invention provides a method for preparing a glycidyl ester compound represented by Formula 1, which comprises reacting a carboxylic acid compound of Formula 2 and epihalohydrin of Formula 3 under reduced pressure without using a reaction solvent, represented by the following Reaction scheme 1:
• the glycidyl ester compound preparation method according to the present invention can increase the unit output of the glycidyl ester compound in the same reactor by performing the reaction under reduced pressure without using the reaction solvent to prepare the glycidyl ester compound.
• the method according to the present invention produces very little side-reaction products and unreacted materials and makes it possible to produce the compound at a higher yield than conventional processes.
• the present invention provides a method for preparing a glycidyl ester compound without the use of reaction solvent to increase the unit output.
• the “unit output” associated with the productivity of the compound is not simply a concept of yield but is the concept of the ratio of the output of the final product to the total input raw materials (including catalyst and reaction solvent).
• Conventional methods for increasing the productivity of the compound have focused on improving the yield and purity.
• the present invention provides a method for increasing the unit output in the same size reactor with the above yield and purity.
• the present invention provides a method in which a reaction solvent is not used. In other words, the present invention can increase the unit output of the finally produced compound by excluding the reaction solvent and supplying the reactants by an amount corresponding to that.
• the preparation method of the glycidyl ester compound proposed in the prior art essentially uses the mixed solvent of water or water/isopropyl alcohol, which means that the progress of reaction cannot be expected without the solvent.
• the method according to the present invention allows the reaction to proceed without the reaction solvent to produce the glycidyl ester compound, which can be achieved by performing the reaction under reduced pressure.
• the glycidyl ester compound of the present invention may be represented by Formula 1 below:
• R 1 is a C1 to C20 alkyl group, a C2 to C20 alkenyl group, a C2 to C20 alkynyl group, a C1 to C20 alkoxy group, a C3 to C20 cycloalkyl group, a C5 to C40 heteroaryl group, a C6 to C40 aryl group, a C6 to C20 alkoxyaryl group, or a C6 to C20 arylalkyl group,
• R 2 is a C1 to C20 alkylene group, C1 to C20 alkenylene group, C3 to C20 cycloalkylene group, or C6 to C40 arylene group,
• R 3 to R 5 are the same or different from each other and are hydrogen or a C1 to C20 alkyl group.
• R 1 may include a primary alkyl group, a secondary alkyl group and a tertiary alkyl group, and more preferably, may be represented by
• R 6 to R 8 may be the same or different from each other and may be hydrogen or a C1 to C20 alkyl group and preferably may satisfy 3 ⁇ sum of carbon numbers (R 6 +R 7 +R 8 ) ⁇ 12 and more preferably 6 ⁇ sum of carbon numbers (R 6 +R 7 +R 8 ) ⁇ 12.
• alkyl refers to a linear or branched saturated monovalent hydrocarbon moiety having 1 to 20, preferably 1 to 10, more preferably 1 to 6 carbon atoms.
• the alkyl group may be unsubstituted or further substituted by a substituent as described below.
• Examples of the alkyl group may include methyl, ethyl, propyl, 2-propyl, n-butyl, iso-butyl, tert-butyl, pentyl, hexyl, dodecyl, fluoromethyl, difluoromethyl, trifluoromethyl, chloromethyl, dichloromethyl, trichloromethyl, iodomethyl, bromomethyl, and the like.
• alkenyl refers to a linear or branched monovalent hydrocarbon moiety containing one or more C ⁇ C double bonds and having 2 to 20, preferably 2 to 10, more preferably 2 to 6 carbon atoms.
• the alkenyl group can be bonded through hydrocarbons containing a C ⁇ C double bond or through saturated hydrocarbons.
• the alkenyl group may be unsubstituted or further substituted by a certain substituent group as described below. Examples of the alkenyl group may include ethenyl, 1-propenyl, 2-propenyl, 2-butenyl, 3-butenyl, pentenyl, 5-hexenyl, dodecenyl and the like.
• alkynyl refers to a linear or branched monovalent hydrocarbon moiety containing one or more C ⁇ C triple bonds and having 2 to 20, preferably 2 to 10, more preferably 2 to 6 carbon atoms.
• the alkynyl group can be bonded through hydrocarbons containing a C ⁇ C triple bond or through saturated hydrocarbons.
• the alkynyl group can be further substituted by a constant substituent group as described below.
• the alkynyl group may be ethynyl, propynyl, and the like.
• alkoxy refers to a linear or branched saturated monovalent hydrocarbon moiety having 1 to 20, preferably 1 to 10, more preferably 1 to 6 carbon atoms.
• the alkoxy group may be unsubstituted or further substituted by a certain substituent group as described below.
• Examples of the alkoxy group may include methoxy, ethoxy, propoxy, isopropoxy, butoxy, pentoxy, heptoxy, dodecoxy, fluoromethoxy, difluoromethoxy, trifluoromethoxy, chloromethoxy, dichloromethoxy, trichloromethoxy, iodomethoxy, bromomethoxy and the like.
• cycloalkyl refers to a saturated or unsaturated, monovalent non-aromatic monocyclic, bicyclic or tricyclic hydrocarbon moiety of 3 to 12 ring carbon atoms, which may be further substituted by a constant substituent as described below.
• the cycloalkyl may be cyclopropyl, cyclobutyl, cyclopentyl, cyclopentenyl, cyclohexyl, cyclohexenyl, cycloheptyl, cyclooctyl, decahydronaphthalenyl, adamantyl, norbornyl (i.e. bycyclo [2, 2, 1] hept-5-enyl) and the like.
• heteroaryl refers to an aryl having 5 to 40, preferably 5 to 12 ring atoms, wherein at least one carbon in the ring is substituted with nitrogen (N), oxygen (O), sulfur (S), or phosphorus (P).
• N nitrogen
• O oxygen
• S sulfur
• P phosphorus
• the heteroaryl refers to a monocyclic, bicyclic or more aromatic group containing 1 to 4 hetero atoms.
• Examples of monocyclic heteroaryls may include, but are not limited to, triazolyl, oxazolyl thiophenyl, furanyl, pyrrolyl, imidazolyl, isoxazolyl, pyrazolyl, triazolyl, thiadiazolyl, tetrazolyl, oxadiazolyl, pyridinyl, pyridazinyl, pyrimidinyl, pyrazinyl and similar groups.
• bicyclic heteroaryl may include, but are not limited to, indolyl, benzothiophenyl, benzofuranyl, benzimidazolyl, benzoxazolyl, benzisoxazolyl, benzthiazolyl, benzthiadiazolyl, benztriazolyl, quinolinyl, isoquinolinyl, purinyl, furo pyridinyl and similar groups.
• aryl refers to a monovalent monocyclic, bicyclic, or tricyclic aromatic hydrocarbon moiety having 6 to 40, preferably 6 to 12 ring atoms, which may be further substituted by a certain substituent as described below.
• Examples of the aryl group may include phenyl, naphthalenyl and fluorenyl.
• alkoxyaryl refers to an aryl in which at least one hydrogen atom of the above-defined aryl group is substituted with an alkoxy group.
• alkoxyaryl group may include methoxyphenyl, ethoxyphenyl, propoxyphenyl, butoxyphenyl, pentoxyphenyl, hextoxyphenyl, heptoxy, octoxy, nanoxy, methoxybiphenyl, methoxynaphthalenyl, methoxyfluorenyl or methoxyanthracenyl.
• arylalkyl refers to an alkyl in which at least one hydrogen atom of the alkyl group defined above is substituted with an aryl group, which may be further substituted by a constant substituent as described below. Examples thereof may include benzyl, benzhydryl, trityl and the like.
• alkylene refers to a linear or branched, saturated divalent hydrocarbon moiety having 1 to 20, preferably 1 to 10, more preferably 1 to 6 carbon atoms.
• the alkylene group may be further substituted by a constant substituent as described below. Examples of the alkylene group may include methylene, ethylene, propylene, butylene, hexylene and the like.
• alkenylene refers to a linear or branched divalent hydrocarbon moiety containing at least one C ⁇ C double bond and having 2 to 20, preferably 2 to 10, and more preferably 2 to 6 carbon atoms.
• the alkenylene group can be bonded through hydrocarbons containing C ⁇ C double bonds and/or through saturated hydrocarbons.
• the alkenylene group can be further substituted by a constant substituent as described below.
• cycloalkylene refers to a saturated or unsaturated, non-aromatic divalent monocyclic, bicyclic or tricyclic hydrocarbon moiety having 3 to 12 ring carbon atoms, which may be further substituted by a constant substituent as described below. Examples thereof may include cyclopropylene, cyclobutylene, and the like.
• arylene refers to a divalent monocyclic, bicyclic or tricyclic aromatic hydrocarbon moiety having 6 to 20, preferably 6 to 12 ring atoms, which may be further substituted by a certain substituent as described below.
• the aromatic part contains only hydrocarbon. Examples of the arylene group may include phenylene and the like.
• arylalkylene refers to a divalent moiety in which at least one hydrogen atom of the alkyl group defined above is substituted with an aryl group, which may be further substituted by a substituent group as described below. Examples thereof may include benzylene and the like.
• alkynylene refers to a linear or branched divalent hydrocarbon moiety containing one or more CC triple bonds and having 2 to 20, preferably 2 to 10, more preferably 2 to 6 carbon atoms.
• the alkynylene group may be bonded through hydrocarbons containing a C ⁇ C triple bond or through saturated hydrocarbons.
• the alkynylene group may be further substituted by a constant substituent group described below. Examples thereof may include ethynylene, propynylene and the like.
• substituted means that hydrogen is replaced with at least one selected from the group consisting of halogen atom, hydroxyl group, carboxyl group, cyano group, nitro group, amino group, thio group, methylthio group, alkoxy group, nitryl group, aldehyde group, epoxy group, ether group, ester group, carbonyl group, acetal group, ketone group, alkyl group, perfluoroalkyl group, cycloalkyl group, heterocycloalkyl group, allyl group, benzyl group, aryl group, heteroaryl group, derivatives thereof and combinations thereof
• the glycidyl ester compound of Formula 1 of the present invention may include all isomers unless otherwise stated.
• all stereoisomers such as isomers which may exist due to asymmetric carbons on various R and Z substituents (including enantiomers (which may exist even in the absence of asymmetric carbons) and diastereomers), are contemplated within the scope of the present invention.
• Each stereoisomer of the compound of the present invention may be, for example, substantially free of other isomers, or may be mixed, for example, as racemates or with all stereoisomers or selected stereoisomers.
• the glycidyl ester compound of Formula 1 according to the present invention is prepared by dehydration reaction of a carboxylic acid compound and an epihalohydrin compound, and this reaction is carried out in the presence of a reaction solvent and a catalyst.
• the glycidyl ester compound may be prepared under the condition that the reaction solvent is not used to increase the unit output of the glycidyl ester compound.
• the glycidyl ester compound of Formula 1 may be prepared by reacting the carboxylic acid compound of Formula 2 and the epihalohydrin of Formula 3 as shown in the following Reaction Scheme 1:
• R 1 to R 5 are as described in Formula 1, and X is halogen.
• X may be Cl, F, Br, or I, more preferably Cl.
• glycidyl ester compound of Formula 1 may be prepared by performing through the following steps of,
• the preliminary reaction may be performed to bind the compound of Formula 2 and the compound of Formula 3, by injecting a base catalyst into a reactor and adding the carboxylic acid compound of Formula 2 and the epihalohydrin of Formula 3 and thus performing a ring-opening reaction.
• the carboxylic acid compound of Formula 2 can be any compound as long as it meets the definition of R 1 , and preferably may be neodecanoic acid, neotridecanoic acid, pivalic acid, and the like. These compounds of Formula 2 can be prepared directly or purchased commercially, and if necessary can be used after purification process in use.
• the epihalohydrin compound of Formula 3 is a compound containing a halogen element (X), which can include various compounds depending on X, and may include epichlorohydrin, epibromohydrin, methylepichlorohydrin or any other known epihalohydrin, preferably epichlorohydrin.
• X halogen element
• the epichlorohydrin is a compound having a molecular formula of C 3 H 5 C 10 , a molecular weight of 92.53 mol/g, and CAS No. 106-89-8.
• the epichlorohydrin is an organochlorine substance having epoxide in its structure, which is a compound with very strong reactivity, and is available from commercial sources.
• the carboxylic acid compound and the epihalohydrin may be used in a molar ratio of from 1:1.2 to 1:5.0.
• the epihalohydrin is used below the above range, the total of the compounds of Formula cannot be converted and thus the yield of the glycidyl ester compound finally obtained is lowered.
• the ratio exceeds the above range, unreacted epihalohydrin is increased to cause a side-reaction therebetween, resulting in an increase in cost and production cost due to the use of excessive epihalohydrin.
• the base catalyst is used to initiate the ring-opening reaction, and may be an alkali metal hydroxide such as LiOH, NaOH or KOH, an alkali earth metal hydroxide such as Ca(OH) 2 or Mg(OH) 2 , or an alkali carbonate such as K 2 CO 3 , Na 2 CO 3 , KHCO 3 and NaHCO 3 . and preferably K 2 CO 3 .
• the base catalyst may be used in the range of from 0.001 to 0.01 mole relative to 1 mole of epihalohydrin of Formula 2 for sufficient catalytic reaction.
• the content of the base catalyst is less than the above range, there is a concern that the yield of the reaction may decrease.
• the content exceeds the above range, there is a concern that side reaction may occur due to excessive reaction. Therefore, it is appropriately used within the above range.
• the order of injection of the base catalyst can be any time, such as before, after, or during the injection of the reactant.
• the preliminary reaction may be carried out by a mechanism as shown in the following Reaction Scheme 2.
• neopentanoic acid or pivalic acid
• epichlorohydrin is used as the compound of Formula 3:
• the neopentanoic acid of Formula 4 may be activated by the base catalyst, and the OH-ion of this compound may attack the epichlorohydrin of Formula 5 to produce a salt-form compound of Formula 6 through a ring-opening reaction.
• This preliminary reaction may be carried out at from 80 to 100° C. for 0.5 to 24 hours. This temperature is for a sufficient preliminary reaction. When the temperature and time are less than the above range, the subsequent ring-closing reaction step is not sufficiently carried out and thus the yield of the compound of Formula 1 is lowered. On the contrary, when the reaction is carried out at an excessive temperature for a long time, there is a concern that a reverse reaction or a side reaction may occur.
• reaction scheme 3 the main reaction for performing the ring-closing reaction may be performed by adding the base to the reactor and reducing the pressure.
• This ring-closing reaction may proceed by the mechanism of the following reaction scheme 3:
• the compound in the salt form of Formula 6 may be rapidly converted into the compound of Formula 7, and oxygen ion may attack the CH 2 of —CH 2 Cl by the base catalyst (transition state of Formula 7′) and thus cause a ring-closing reaction between C—O to form a glycidyl ester compound of Formula 8 in which an epoxy ring is formed at the end.
• the base catalyst used may be the same as or different from the base used in step S1), preferably NaOH.
• the base catalyst may be used in the range of from 0.01 to 1.2 moles relative to 1 mole of the compound of Formula 7 for sufficient catalytic reaction. At this time, the content of the compound of Formula 7 presupposes that 100% of the reactants from the previous step are converted.
• the content of the base catalyst is less than the above range, there is a concern that the ring-closing reaction is insufficient and thus the yield of the reaction may be lowered.
• the content exceeds the above range, there is a concern that the side reaction may occur due to excessive reaction. Therefore, it is appropriately used within the above range.
• the main reaction in which the ring-closing reaction is performed is carried out in the presence of water or a mixed solvent of water/IPA.
• the reaction may be carried out without the reaction solvent, but under reduced pressure so that the ring-closing reaction can be smoothly performed.
• the main reaction may be carried out at from 35 to 90° C., preferably at from 40 to 80° C. for 0.5 to hours after reducing the pressure to 50 to 200 Torr, preferably 100 to 150 Torr. At this time, when the pressure is higher than the above range, a sufficient reaction is not performed. On the contrary, when the pressure is lower than the above range, there is a concern that a side reaction may occur.
• the main reaction is a reaction in which water is produced as a product of the reaction, wherein a reverse reaction may occur due to the generated water. Therefore, in order to prevent the reverse reaction, the device used for the main reaction may use a device capable of decanting.
• the glycidyl ester compound obtained by the ring-closing reaction may be subjected to a subsequent purification process, and at this time, degassing and further ring-closing reactions may be performed before the purification process.
• the degassing may be carried out to remove the unreacted epihalohydrin of Formula 3 in the product obtained between the main reaction and the post-treatment.
• the degassing process may be performed at a temperature of from 110 to 150° C. under a pressure of 10 Torr or less.
• an additional ring-closing reaction may be performed by adding a base catalyst to the product obtained before the post-treatment.
• the type and content of the base catalyst used in the additional ring-closing reaction, the reaction condition and the like are as described above.
• the post-treatment to purify the product obtained in the previous step S2) may be carried out to obtain the glycidyl ester compound of Formula 1.
• the post-treatment process is for removing unreacted materials and by-products of the reaction and is not particularly limited in the present invention and can be a process commonly used in the preparing process of the compound.
• the purification process may be carried out after desalting, washing and neutralization.
• the purification process is not particularly limited in the present invention, and various known processes can be used.
• the purification process may be performed by any one of simple distillation, fractional distillation, azeotropic distillation, vacuum distillation, recrystallization, extraction, sublimation or chromatography, and preferably may be performed by distillation process.
• the purification using distillation method passes the resulting product through a distillation column to transfer the glycidyl ester compound to the upper connector while at the same time transporting unreacted compounds or side-reaction compounds to the lower connector of the distillation column.
• the method according to the present invention may produce very little side-reaction products and unreacted materials, and it is possible to prepare the compound at a higher yield than the conventional processes.
• the prepared glycidyl ester compound can be applied variously as a diluent to reactivity, and also to raw materials of various compounds, intermediates, the preparation of resin and the like.
• the reactor was cooled to a temperature of 60° C., and then 50 wt. % NaOH 511 g (12.772 mol) was uniformly added dropwise for hours using a funnel while maintaining the degree of vacuum of 120 to 140 Torr and 60° C. During the reaction for hours, water was generated and water was continuously removed using a decanter facility. After completing the dropwise addition of 50 wt. % NaOH, water was continuously removed with further stirring for 1 hour.
• the reaction was performed while raising the reaction temperature to 130° C., and then degassing was carried out under 10 Torr or less. Thereafter, the amount of chlorine in the product (Hy-Cl) was measured.
• the reactor was cooled to a temperature of 60° C. and then 50 wt. % NaOH 511 g (12.772 mol) was uniformly added dropwise for 2 hours using a funnel while maintaining the degree of vacuum of 120 to 140 Torr and 60° C. During the reaction for 2 hours, water was generated and water was continuously removed using a decanter facility. After completing the dropwise addition of 50 wt. % NaOH, water was continuously removed with further stirring for 1 hour.
• the reaction was performed while raising the reaction temperature to 130° C., and then degassing was carried out under 10 Torr or less. Thereafter, the amount of chlorine in the product (Hy-Cl) was measured.
• the oil phase of the upper layer was then recovered and degassed under a vacuum of 10 Torr at 120° C. to produce the title compound.
• (oxiran-2-yl) methyl pivalate was prepared. At this time, the preparation of (oxiran-2-yl) methyl pivalate was carried out in the same manner as in Example 1 except that water/isopropyl alcohol was used as a solvent.
• the reactor was cooled to a temperature of 50° C. and then 50 wt. % NaOH 306 g (7.65 mol) was uniformly added dropwise over 40 minutes, followed by stirring for 40 minutes.
• the oil phase of the upper layer was then recovered and degassed under a vacuum of 10 Torr at 120° C. to produce the title compound.
• the reactor was cooled to a temperature of 50° C. and then 50 wt. % NaOH 306 g (9.15 mol) was uniformly added dropwise over 40 minutes, followed by stirring for 40 minutes.
• the oil phase of the upper layer was then recovered and degassed under a vacuum of 10 Torr at 120° C. to produce the title compound.
• B is consumption (ml) of 0.1 N NaOH (methanol) at the titration of blind test
• A is the consumption (ml) of 0.1N NaOH (methanol) at the titration of the sample
• W is the amount (g) of the sample.
• the glass cooling tube was washed with 5 to 10 ml of methanol and added to the flask.
• the solution in the Erlenmeyer flask was transferred to a 200 ml beaker, and the inside of the Erlenmeyer flask was washed with the aqueous 80% acetone solution two to three times. Thereafter, the washing solution was added to the beaker and then the total volume was made to be 100 ml.
• V is the consumption (ml) of 0.01 N AgNO 3 at the titration of the sample
• B is the consumption (ml) of 0.01 N AgNO 3 at the titration of the blind test
• W is the amount (g) of the sample.
• reflux cooling tube was attached and then the mixture, when refluxing, was heated on a hot plate for 20 minutes, cooled to room temperature, and the cooling tube was washed with 5 ml of methanol and added to the flask.
• V is the consumption (ml) of 0.01 N AgNO 3 at the titration of the sample
• B is the consumption (ml) of 0.01 N AgNO 3 at the titration of the blind test
• F is the factor of 0.01N AgNO 3 ,
• W is the amount (g) of the sample.
• R is the total content (g) in which the product is theoretically 100% produced.
• the amount of the hydrolysable chlorine means that there are many epichlorohydrin unreacted materials and by-products and the large value means that the content of the impurities in the final product is large.
• the total amount of chlorine means the remaining chlorine, which is predicted as a by-product after the completion of the reaction.
• a large value of the total amount of chlorine means that the content of impurities in the final product is large
• the compounds produced in the Examples and Comparative Examples were analyzed as follows to calculate the unit output, and the results are shown in Table 2 below.
• the unit output was calculated as the amount of the compound produced in the 5 L reactor and was calculated assuming that the content of the final compounds of Comparative Example 1 was 100%.
• the method of preparing the glycidyl ester compound according to the present invention has greatly improved unit output and thus it can be suitably applied to a mass production process.

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